The invention relates to crystalline folate salts. The salt consists of a folate anion and an organic cation. The folate anion is 5-methyl-(6S)-tetrahydrofolic acid or 5-formyl-(6S)-tetrahydrofolic acid, and the cation is an organic compound which is an alkanolamine selected from the group consisting of choline, N-methylaminoethanol, 2-Amino-2-methylpropanol and 2-dimethylaminoethanol.